tazobactam and its Impurities
A bacterial β-lactamases inhibitor. Tazobactam is taken in combination with piperacillin.Reference standards of Tazobactam API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(3R)-3-((1H-1,2,3-Triazol-1-yl)methyl)-3-methyl-4-thia-1-azabicyclo[3.2.0]heptan-7-one 4,4-dioxide
(3R)-3-((1H-1,2,3-Triazol-1-yl)methyl)-3-methyl-4-thia-1-azabicyclo[3.2.0]heptan-7-one 4,4-dioxide
Catalogue No.:PA 20 75530
CAS :
NA
Molecular Formula : C9H12N4O3S
Molecular Weight : 256.28


(2S,3S)-Ethyl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide
(2S,3S)-Ethyl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide
Catalogue No.:PA 20 75540
CAS :
NA
Molecular Formula : C12H16N4O5S
Molecular Weight : 328.34


(2S,3R)-2,3-Dicarboxy-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane 1-oxide 4,4-dioxide
(2S,3R)-2,3-Dicarboxy-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane 1-oxide 4,4-dioxide
Catalogue No.:PA 20 75550
CAS :
NA
Molecular Formula : C10H8N4O9S
Molecular Weight : 360.26


(2S,3S)-3-Formyl-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
(2S,3S)-3-Formyl-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
Catalogue No.:PA 20 75560
CAS :
NA
Molecular Formula : C10H8N4O7S
Molecular Weight : 328.26


(2S,3S)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide
(2S,3S)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide
Catalogue No.:PA 20 75570
CAS :
NA
Molecular Formula : C23H22N4O5S
Molecular Weight : 466.51


(2R,3S)-Benzhydryl 3-methyl-8-oxo-3-(1H-1,2,3-triazol-1-yl)-5-thia-1-azabicyclo[4.2.0]octane-2-carboxylate
(2R,3S)-Benzhydryl 3-methyl-8-oxo-3-(1H-1,2,3-triazol-1-yl)-5-thia-1-azabicyclo[4.2.0]octane-2-carboxylate
Catalogue No.:PA 20 75620
CAS :
NA
Molecular Formula : C23H22N4O3S
Molecular Weight : 434.51


(2S,3R)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
(2S,3R)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
Catalogue No.:PA 20 75630
CAS :
NA
Molecular Formula : C23H22N4O3S
Molecular Weight : 434.51


(2S,3S)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide
(2S,3S)-Benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide
Catalogue No.:PA 20 75640
CAS :
1628710-72-4
Molecular Formula : C23H22N4O4S
Molecular Weight : 450.51


(2S,3R)-3-Carboxy-2-(2,2-diphenylacetyl)-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane 1-oxide 4,4-dioxide
(2S,3R)-3-Carboxy-2-(2,2-diphenylacetyl)-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane 1-oxide 4,4-dioxide
Catalogue No.:PA 20 75650
CAS :
NA
Molecular Formula : C23H18N4O8S
Molecular Weight : 510.48


(2S,3S)-2-(2,2-Diphenylacetyl)-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane-3-carbaldehyde 4,4-dioxide
(2S,3S)-2-(2,2-Diphenylacetyl)-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane-3-carbaldehyde 4,4-dioxide
Catalogue No.:PA 20 75660
CAS :
NA
Molecular Formula : C23H18N4O6S
Molecular Weight : 478.48


Benzhydryl (2S,3R)-3-(chloromethyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
Benzhydryl (2S,3R)-3-(chloromethyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
Catalogue No.:PA 20 75680
CAS :
2538151-39-0
Molecular Formula : C21H20ClNO3S
Molecular Weight : 401.91


Tazobactam - Impurity D
(5aS,6aR,9aS)-1-(Diphenylmethyl)-5a-methyl-5a,6a,7,9a-tetrahydro-1H-6λ6 -azeto[2',1':2,3][1,3]thiazolo[5,4-e][1,2,3]triazolo[2,1-b][1,2,3]oxadiazepine-6,6,8,10(5H)-tetrone
Catalogue No.:PA 20 0750040
CAS :
NA
Molecular Formula : C23H22N4O5S
Molecular Weight : 466.51


(2S,3S,5R)-3-((2H-1,2,3-Triazol-2-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
(2S,3S,5R)-3-((2H-1,2,3-Triazol-2-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
Catalogue No.:PA 20 0751001
CAS :
765233-56-5
Molecular Formula : C10H12N4O5S
Molecular Weight : 300.29


(2S,5R)-Benzhydryl 3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide (BSC)
(2S,5R)-Benzhydryl 3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide
Catalogue No.:PA BSC 07520944
CAS :
87579-78-0
Molecular Formula : C21H21NO4S
Molecular Weight : 383.46